How much walking while healing from laminitis?

beverly meyer

Ginger's doing better and is now happy to get out of her 20 x 30 enclosure.  She will walk to the far side of the pasture/yard, but then is slower on the way back. By the time we get to the pen, she is stumbling a little.

Wouldn't this be disturbing the new lamina?  

Should I keep her on the lead and not go out so far, until she doesn't stumble anymore?

Is there any other good way to judge how much walking is safe?

Thank you.

Beverly 6/14

Beverly Texas